CN104821850A - Device for actively calibrating optical fiber transmission of microwave signals by means of photoelectric oscillator - Google Patents
Device for actively calibrating optical fiber transmission of microwave signals by means of photoelectric oscillator Download PDFInfo
- Publication number
- CN104821850A CN104821850A CN201510166121.8A CN201510166121A CN104821850A CN 104821850 A CN104821850 A CN 104821850A CN 201510166121 A CN201510166121 A CN 201510166121A CN 104821850 A CN104821850 A CN 104821850A
- Authority
- CN
- China
- Prior art keywords
- signal
- port
- optical
- electric
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A device for actively calibrating optical fiber transmission of microwave signals by means of a photoelectric oscillator comprises a central station and a base station, wherein the central station is connected with the base station through a single-mode optical fiber. The device can overcome defects of a traditional electronic method at aspects of bandwidth, weight, size, electromagnetic interference, etc. Furthermore the device overcomes a bottleneck of realizing stable-phase transmission of high-frequency microwave signals through electronic technology.
Description
Technical field
The invention belongs to Microwave photonics technical field, being that a kind of photon technology and optical-electronic oscillator are theoretical in particular surely transmits microwave signal shape mutually, a kind ofly realizes based on round phase correction techniques the device that stabilized fiber transmits microwave signal mutually.
Background technology
In recent years, utilize monomode fiber surely to transmit microwave signal mutually based on photon technology to have attracted to pay close attention to widely, comprising modern times many base stations radar, the Long baselines antenna of Long baselines interferometric method deep space instrumentation system (DSIS), various interferometry system, radio astronomy such as to be structured the formation at the field such as radio-frequency (RF) communication system and electronic warfare system, and microwave technology and photon technology merge the inexorable trend becoming scientific and technological progress mutually.Based on photon technology surely transmit mutually microwave signal overcome on the one hand electronic technology surely transmit electronic bottleneck that microwave signal exists mutually and cable transmission line loss large, volume is large, cost is high, be difficult to realize long-distance transmissions, the innate advantage taking full advantage of photon technology is on the other hand as low in loss, lightweight, be with roomy, speed is fast, electromagnetism interference and the plurality of advantages such as frequency response is smooth, in addition photon technology surely mutually transmit microwave signal can carry the natural compatibility of radio system with all-optical network and light, realize the transmission of microwave signal stabilized fiber Entropy density deviation, effectively overcome the problem that the cable transmission loss of high-frequency microwave signal is large.
Be summed up, utilize photon technology surely to transmit microwave signal mutually and can be divided into two large classes, one is Active phase corrective system, and two is passive phase correction systems.But, utilize the correction accuracy of passive phasing low and need to there is larger correction error.In order to overcome the shortcoming of passive phase control, this patent proposes a kind of method that novel Active and Real-time eliminates radiofrequency signal phase error.
The frequency surely transmitting microwave signal based on photon technology mutually even can reach Terahertz frequency range up to hundreds of G, and the distributed of microwave signal can be realized surely transmit mutually, and multipoint mode access, greatly reduce electronic technology and realize cost, the volume and weight that microwave signal surely transmits mutually, photon technology microwave signal surely mutually transmission achieve the task that microwave technology can not realize.Therefore, based on photon technology realize microwave signal surely mutually transmission there is important strategic importance and urgent application demand.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission, to overcome the inferior position of conventional electronics method in bandwidth, weight, volume, electromagnetic interference etc., and break through electronic technology and realize the bottleneck that high-frequency microwave signal surely transmits mutually.
For achieving the above object, the invention provides a kind of device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission, comprising:
One central station and a base station, connected by a monomode fiber between its central station and base station.
As can be seen from technique scheme, the present invention has following beneficial effect:
1, the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission provided by the invention, owing to adopting the scheme of photon technology so overcome conventional electronics method in bandwidth, weight, volume, the inferior position of the aspects such as electromagnetic interference, and breach electronic technology and realize the bottleneck that high-frequency microwave signal surely transmits mutually, and utilize the theory of optical-electronic oscillator effectively can improve the short-term stability of transmission microwave signal, by super for microwave signal reference field steady reference being improved the long-time stability of transmission microwave signal, this system can access by multiple spot in addition, by 4 port optical couplers, transmission microwave signal is linked into multiple spot.
2, the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission provided by the invention, owing to utilizing optical-electronic oscillator principle so the phase noise of microwave signal of transmission is lower, due to for high-frequency microwave signal.
3, realize microwave signal stabilized fiber transmit mutually owing to adopting Active phase to correct, therefore overcome passive mode and realize the low drawback of precision that microwave signal surely transmits mutually; The related device of the program is all the device that market can be bought, therefore the program can realize practical, Stability Analysis of Structures, with low cost.
Accompanying drawing explanation
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail, wherein:
Fig. 1 is the structural representation utilizing the device of optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission provided by the invention;
Fig. 2, Fig. 3 are the similar figure utilizing the device of optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission to produce experimental result provided by the invention;
Embodiment
The device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission provided by the invention, comprising: central station 20 and a base station 50, is connected by a monomode fiber 40 between its central station 20 and base station 50.The described device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission, wherein this central station 20 comprises: laser 21 is for carrying the microwave signal of needs transmission, this light signal be input to two balanced Mach once moral intensity modulator 22 produce modulation sideband, then optical filter is passed through, a Mach once moral modulation for Mach zehnder modulators is offset to minimum transfer point, therefore carrier wave suppressed fall, an another Mach zehnder modulators is offset to maximum transmitted point, carry out filtering by optical filter and produce single-side band modulation light signal, phase shift can be introduced, thus the phase place change that real-Time Compensation is introduced due to ambient temperature and vibration, the light signal of intensity modulated is divided into two-way by optical coupler, one tunnel enters photodetector and forms optical-electronic oscillator and the microwave signal producing reference, another road light signal is transferred to base station by monomode fiber from central station and passes back to central station from base station, the light signal of passback carries out opto-electronic conversion by photodetector, produce with frequency microwave signal, this microwave signal with reference to microwave signal carry out uppermixing produce 2 frequency multiplication microwave signals and this two frequencys multiplication microwave signal with reference to microwave signal carry out second time mixing produce required for error voltage signal, this error voltage signal feeds back to electric phase shifter, thus the phase place of the microwave signal of real-time control propagation, the phase jitter that compensate for link is introduced.Which incorporates the theoretical and Active phase of optical-electronic oscillator to correct and high-quality microwave signal surely can be transmitted mutually, consistent when the frequency of this microwave signal and phase place and base station needs the microwave signal transmitted.
As shown in Figure 1, Fig. 1 is the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission provided by the invention, and this device one central station 20 and a base station 50, connected by a monomode fiber 40 between its central station 20 and base station 50.Wherein this central station 20 comprises: laser 21, two balanced Mach zehnder modulators 22, optical filter 23, first optical coupler 24, first circulator 25, first photodetector 26, electrical filter 27, electric amplifier 28, the first electric coupling 29, second electric coupling 30, electricity frequency multiplier 31, the electric frequency mixer 34 of 3rd photodetector 32, first electric frequency mixer 33, second, electricity phase shifter 35, electric amplifier 36; This base station 50 comprises: the second optical coupler 51, second optical circulator 52, image intensifer 53, the second photodetector 54.
Wherein, laser 21, for carrying the microwave signal needing transmission, its output is connected with two balanced Mach zehnder modulators, provides continuous light signal; Two balanced Mach zehnder modulators 22, its light input end mouth 1 is connected with the output of laser 21; For electro-optic conversion, will the microwave signal of transmission be needed to be modulated on light carrier, and regulate the phase place of microwave signal, the phase response modulation signal of real-Time Compensation link transfers to base station from central station, and by partial modulation signal return to central station; Optical filter 23, its input is connected with the optical output port 2 of two balanced Mach zehnder modulators 22, and the double-side band light signal filter for modulation being produced is single sideband signals; First optical coupler 24, its port one is connected with the output of optical filter 23, for modulated light signal is divided into two-way; , wherein splitting ratio is 1: 9, and the light signal of fraction is input to the first photodetector, and as reference signal, most of light signal is transferred to base station from central station and the modulated light signal that base station is reflected is passed back to central station, and it exports and connects and first circulator; First circulator 25, its port one is connected with the port 2 of the first optical coupler 24, for modulated light signal is transferred to base station and from base-station transmission to base station from central station; First photodetector 26, its input is connected with the port 3 of the first optical coupler 24, for modulated light signal is converted to microwave signal; Electrical filter 27, its input is connected with the output of the first photodetector 26, for the pattern of filtering optoelectronic oscillation loop, only allows single-mode vibration; Electric amplifier 28, its input is connected with the output of electrical filter 27, for being amplified by the signal of telecommunication caught on a filter, and meets gain and is greater than loss; First electric coupling 29, its port one is connected with the output of electric amplifier 28, and for the signal of telecommunication caught on a filter is divided into two-way, the first electric frequency mixer is incided on a road, and the second electric coupling is incided on another road; Second electric coupling 30, its port one is connected with the port 3 of the first electric coupling 29, is divided into two-way for the signal of telecommunication after merit being divided, and incides electric frequency multiplier and electric phase shifter respectively; Electricity frequency multiplier 31, its input is connected with the port 2 of the second electric coupling 30, for the signal of telecommunication frequency multiplication of merit being divided, and inputs electric second frequency mixer; 3rd photodetector 32, its input is connected with the port 3 of the first circulator 25, for the light signal of passback is carried out opto-electronic conversion, produces microwave signal and is input to second point frequency mixer; First electric frequency mixer 33, its port one is connected with the output of the 3rd photodetector 32, and the signal of telecommunication produced for the signal of telecommunication that produced by optical-electronic oscillator and the 3rd photodetector carries out mixing, and this is mixed down uppermixing by signal of telecommunication frequency multiplication; Second electric frequency mixer 34, its port one is connected with the port 2 of the first electric frequency mixer 33, the signal of telecommunication mixing that the signal of telecommunication of two frequencys multiplication and the first frequency mixer export, and produces the voltage signal that phase place is floated; Electricity phase shifter 35, its port one is connected with the port 3 of the second electric frequency mixer 34, its port 2 is connected with the port 3 of the second electric coupling 30, and the signal of telecommunication produced for link phase place being floated is converted to the phase place change of corresponding microwave signal, therefore the phase noise of compensate for link that can be real-time; Electric amplifier 36, its input is connected with the port 3 of electric phase shifter 35, for being amplified by electric signal power.Monomode fiber 40 for by modulated light signal from central station be transferred to base station and by light signal from base-station transmission to central station; The described device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission, wherein this base station 50 comprises: the second optical coupler 51, for the light signal of modulation is divided into two-way, a road modulated light signal passes back to base station from base station, and another road light signal is input to the second photodetector; Second optical circulator 52, its input 2 is connected with the port 2 of the second optical coupler 51, for the optical return signal being transferred to base station from central station is passed to central station; Image intensifer 53, its input is connected with the output 3 of the second optical circulator 52, and its output port is connected with 1 port of ring of light device, for being amplified by modulated light signal and returning all central stations; Second photodetector 54, its input is connected with the port 3 of the second optical coupler 51, and the light for being sent by central station carries microwave signal and carries out opto-electronic conversion.
Described laser 21 can be semiconductor laser, also can be fiber laser, and the live width of laser is more narrow better, and the stability of laser is more steady better, and the power output of laser is as far as possible large, and the power adjustable that this laser exports; Described two balanced Mach zehnder modulators 22 adopt lithium columbate crystal modulator, semiconductor modulator or organic polymer modulator, and the half-wave voltage of modulator is better, and the Insertion Loss of modulator is the smaller the better; Described electrical filter 27 can be any structure, the height but the Out-of-band rejection of filter ratio should be tried one's best, and the parasitic passband of filter should as far as possible away from the fundamental frequency signal needed and 2 subfrequency places; Described photodetector 26,32,54 is photodiode or photomultiplier, adopts indium phosphide or silica-base material.
Give the experimental result picture that microwave signal stabilized fiber of the present invention transmits mutually as shown in Figure 2,3, this figure is similar results figure, Fig. 2 and Fig. 3 is the time domain waveform of the microwave signal gathered by sampling oscilloscope, Fig. 2 is the experimental result picture not carrying out surely transmitting mutually, Fig. 3 is the experimental result picture after steady phase, microwave signal phase before transmission mutually can be obtained surely along with time drift by figure, steady mutually after the phase place of microwave signal change in time and substantially do not drift about.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. utilize a device for optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission, comprising:
One central station and a base station, connected by a monomode fiber between its central station and base station.
2. the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission according to claim 1, wherein this central station comprises:
One laser, for carrying the microwave signal needing transmission;
A pair of balanced Mach zehnder modulators, its light input end mouth 1 is connected with the output of laser;
One optical filter, its input is connected with the optical output port 2 of two balanced Mach zehnder modulators, and the double-side band light signal filter for modulation being produced is single sideband signals;
One first optical coupler, its port one is connected with the output of optical filter, for modulated light signal is divided into two-way;
One first circulator, its port one is connected with the port 2 of the first optical coupler, for modulated light signal is transferred to base station and from base-station transmission to base station from central station;
One first photodetector, its input is connected with the port 3 of the first optical coupler, for modulated light signal is converted to microwave signal;
One electrical filter, its input is connected with the output of the first photodetector, for the pattern of filtering optoelectronic oscillation loop, only allows single-mode vibration;
One electric amplifier, its input is connected with the output of electrical filter, for being amplified by the signal of telecommunication caught on a filter, and meets gain and is greater than loss;
One first electric coupling, its port one is connected with the output of electric amplifier, for the signal of telecommunication caught on a filter is divided into two-way;
One second electric coupling, its port one is connected with the port 3 of the first electric coupling, is divided into two-way for the signal of telecommunication after merit being divided, and incides electric frequency multiplier and electric phase shifter respectively;
One electric frequency multiplier, its input is connected with the port 2 of the second electric coupling, for the signal of telecommunication frequency multiplication of merit being divided, and inputs electric second frequency mixer;
One the 3rd photodetector, its input is connected with the port 3 of the first circulator, for the light signal of passback is carried out opto-electronic conversion, produces microwave signal and is input to second point frequency mixer;
One first electric frequency mixer, its port one is connected with the output of the 3rd photodetector, and the signal of telecommunication produced for the signal of telecommunication that produced by optical-electronic oscillator and the 3rd photodetector carries out mixing, and this is mixed down uppermixing by signal of telecommunication frequency multiplication;
One second electric frequency mixer, its port one is connected with the port 2 of the first electric frequency mixer, the signal of telecommunication mixing that the signal of telecommunication of two frequencys multiplication and the first frequency mixer export, and produces the voltage signal that phase place is floated;
One electric phase shifter, its port one is connected with the port 3 of the second electric frequency mixer, its port 2 is connected with the port 3 of the second electric coupling, and the signal of telecommunication produced for link phase place being floated is converted to the phase place change of corresponding microwave signal, therefore the phase noise of compensate for link that can be real-time;
One electric amplifier, its input is connected with the port 3 of electric phase shifter, for being amplified by electric signal power.
3. the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission according to claim 1, wherein this base station comprises:
One second optical coupler, for the light signal of modulation is divided into two-way, a road modulated light signal passes back to base station from base station, and another road light signal is input to the second photodetector;
One second optical circulator, its input 2 is connected with the port 2 of the second optical coupler, for the optical return signal being transferred to base station from central station is passed to central station;
One image intensifer, its input is connected with the output 3 of the second optical circulator, and its output port is connected with the port one of ring of light device, for being amplified by modulated light signal and returning all central stations;
One second photodetector, its input is connected with the port 3 of the second optical coupler, and the light for being sent by central station carries microwave signal and carries out opto-electronic conversion.
4. the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission according to claim 1, wherein said laser is semiconductor laser or fiber laser, the power adjustable that this laser exports.
5. the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission according to claim 1, wherein said two balanced Mach zehnder modulators adopt lithium columbate crystal modulator, semiconductor modulator or organic polymer modulator.
6. the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission according to claim 1, wherein said electrical filter is the electrical filter of any structure, the Out-of-band rejection ratio of this electrical filter should be tried one's best height, and the parasitic passband of this electrical filter should as far as possible away from the fundamental frequency signal needed and 2 subfrequency places.
7. the device utilizing optical-electronic oscillator active calibration microwave signal Optical Fiber Transmission according to claim 1, wherein said first, the 3rd and second photodetector is photodiode or photomultiplier, adopts indium phosphide or silica-base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510166121.8A CN104821850B (en) | 2015-04-09 | 2015-04-09 | Utilize the device of optical-electronic oscillator active calibration optical fiber transmission microwave signal phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510166121.8A CN104821850B (en) | 2015-04-09 | 2015-04-09 | Utilize the device of optical-electronic oscillator active calibration optical fiber transmission microwave signal phase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104821850A true CN104821850A (en) | 2015-08-05 |
| CN104821850B CN104821850B (en) | 2017-07-14 |
Family
ID=53732034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510166121.8A Active CN104821850B (en) | 2015-04-09 | 2015-04-09 | Utilize the device of optical-electronic oscillator active calibration optical fiber transmission microwave signal phase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104821850B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309334A (en) * | 2018-11-13 | 2019-02-05 | 北京无线电计量测试研究所 | Based on warbled optical-electronic oscillator and control method |
| CN110824888A (en) * | 2018-08-09 | 2020-02-21 | 中国计量科学研究院 | Signal acquisition method and device applied to atomic fountain clock |
| CN113093157A (en) * | 2021-04-02 | 2021-07-09 | 中国电子科技集团公司第三十八研究所 | Distributed receiving array channel error calibration method and system based on microwave photon phase-stabilized transmission link |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5687261A (en) * | 1996-01-24 | 1997-11-11 | California Institute Of Technology | Fiber-optic delay-line stabilization of heterodyne optical signal generator and method using same |
| CN103490817A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Photonic generation device for high-frequency microwaves and millimeter waves and feeding method |
| CN103490818A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Compensator and compensation method for transmission delay in optical fiber time frequency transmission |
| CN104065416A (en) * | 2014-06-26 | 2014-09-24 | 中国科学院半导体研究所 | Microwave signal optical fiber stationary phase transmission system based on microwave phase shifter |
| CN104168063A (en) * | 2014-08-27 | 2014-11-26 | 中国科学院半导体研究所 | Microwave signal optical fiber stationary phase transmission device based on wave length multiplex |
| CN104168064A (en) * | 2014-08-27 | 2014-11-26 | 中国科学院半导体研究所 | Microwave signal optical fiber stationary-phase transmission device based on back and forth phase correction |
| CN104467967A (en) * | 2014-10-21 | 2015-03-25 | 中国科学院半导体研究所 | Microwave signal optical fiber steady-phase transmission system based on phase compensation |
-
2015
- 2015-04-09 CN CN201510166121.8A patent/CN104821850B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5687261A (en) * | 1996-01-24 | 1997-11-11 | California Institute Of Technology | Fiber-optic delay-line stabilization of heterodyne optical signal generator and method using same |
| CN103490817A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Photonic generation device for high-frequency microwaves and millimeter waves and feeding method |
| CN103490818A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Compensator and compensation method for transmission delay in optical fiber time frequency transmission |
| CN104065416A (en) * | 2014-06-26 | 2014-09-24 | 中国科学院半导体研究所 | Microwave signal optical fiber stationary phase transmission system based on microwave phase shifter |
| CN104168063A (en) * | 2014-08-27 | 2014-11-26 | 中国科学院半导体研究所 | Microwave signal optical fiber stationary phase transmission device based on wave length multiplex |
| CN104168064A (en) * | 2014-08-27 | 2014-11-26 | 中国科学院半导体研究所 | Microwave signal optical fiber stationary-phase transmission device based on back and forth phase correction |
| CN104467967A (en) * | 2014-10-21 | 2015-03-25 | 中国科学院半导体研究所 | Microwave signal optical fiber steady-phase transmission system based on phase compensation |
Non-Patent Citations (2)
| Title |
|---|
| ZHONGLE WU,ETAL.: "Stable radio frequency phase delivery by rapid and endless post error cancellation", 《OPTICS LETTERS》 * |
| 常乐等: "光纤稳相微波频率传输中相干瑞利噪声的影响与抑制", 《光学学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824888A (en) * | 2018-08-09 | 2020-02-21 | 中国计量科学研究院 | Signal acquisition method and device applied to atomic fountain clock |
| CN110824888B (en) * | 2018-08-09 | 2021-02-02 | 中国计量科学研究院 | Signal acquisition method and device applied to atomic fountain clock |
| CN109309334A (en) * | 2018-11-13 | 2019-02-05 | 北京无线电计量测试研究所 | Based on warbled optical-electronic oscillator and control method |
| CN109309334B (en) * | 2018-11-13 | 2020-04-28 | 北京无线电计量测试研究所 | Frequency modulation-based optoelectronic oscillator and control method |
| CN113093157A (en) * | 2021-04-02 | 2021-07-09 | 中国电子科技集团公司第三十八研究所 | Distributed receiving array channel error calibration method and system based on microwave photon phase-stabilized transmission link |
| CN113093157B (en) * | 2021-04-02 | 2023-10-03 | 中国电子科技集团公司第三十八研究所 | Distributed receiving array channel error calibration method and system based on microwave photon steady-phase transmission link |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104821850B (en) | 2017-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104065416B (en) | Based on the microwave signal stabilized fiber phase transmission system of microwave phase shifter | |
| CN103716089B (en) | A kind of radiofrequency signal stabilized fiber phase transmission method and system | |
| CN103219632B (en) | Frequency multiplication photoelectric oscillator | |
| CN104202090B (en) | The microwave signal long-distance optical fiber steady phase transmitting device of optically-based phase conjugation | |
| US8620158B2 (en) | Communications device with discriminator and wavelength division multiplexing for generating intermediate frequency signal and related methods | |
| US8526817B2 (en) | Communications device with discriminator for generating intermediate frequency signal and related methods | |
| CN104467967B (en) | Microwave signal stabilized fiber phase Transmission system based on phase compensation | |
| CN102856778B (en) | Device and method capable of generating multi-bandwidth high-frequency tunable microwave signals | |
| CN107682087B (en) | A kind of steady phase transmission method of microwave optical fiber for eliminating local oscillator leakage in passive phase correction | |
| CN103490823B (en) | A kind of source generating device of many microwave local oscillations based on microwave photon | |
| CN103944643A (en) | Up-conversion device capable of achieving full-gloss microwave based on cross polarization modulation | |
| CN104168064A (en) | Microwave signal optical fiber stationary-phase transmission device based on back and forth phase correction | |
| CN109193318B (en) | Up-down frequency conversion system based on mode-locked laser | |
| CN103941429A (en) | Device for producing random waveform microwave signal based on cross polarization modulation | |
| CN106301576B (en) | A kind of steady phase transmission method of multi-frequency multiple spot microwave optical fiber based on passive phase correction | |
| CN204886978U (en) | Equal 36 adjustable frequency -doubled signal generating device of no filtering compensation suppressed carrier system | |
| CN104168063A (en) | Microwave signal optical fiber stationary phase transmission device based on wave length multiplex | |
| CN103885268A (en) | Device for generating all-optical quadruplicated frequency microwaves based on cross polarization modulation and Sagnac ring | |
| CN103780312B (en) | The steady phase transmission method of radiofrequency signal and system | |
| CN104181748B (en) | Microwave pulse signal generating device based on light-operated nonlinear annular mirror | |
| CN104821850A (en) | Device for actively calibrating optical fiber transmission of microwave signals by means of photoelectric oscillator | |
| CN104092491A (en) | Optical frequency comb generating device and method of photoelectric oscillator | |
| CN104051934A (en) | Optoelectronic oscillator and method based on electrical loop filtering | |
| CN101951295B (en) | Millimeter wave (MMW) generator on basis of generating photocarrier SSB by phase shift method | |
| Liu et al. | Silicon integrated microwave photonic mixer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |